I understand your frustration.

I'm sure you'll get some lengthy replies, but I'll just keep this simple.

Bottom line is, a group is not made by a single player. It takes the coordination of the entire group doing well in order to win things like moogle fight.

The fact that you were losing is an indication that your group was performly poorly. Perhaps you were contributing to this, perhaps you were the best player in the group. It doesn't matter though unless everyone knows what they are doing and are doing it correctly.